Autoflower Outdoor Nutrients: Specific, Generic & Homemade

Growing marijuana outdoors can be as simple as putting seeds or seedlings into the ground and only coming back for the harvest. Nevertheless, using autoflower outdoor nutrients can turn even an average producer into a xxl strain. We’ll show you what nutrients to feed your autoflower plants outdoors.

Often, it’s Best to Go Organic

We personally have achieved great results by simply growing autoflowers next to tomatoes and giving both the same treatment.

If the soil is rich enough for a regular vegetable garden, just amend it with some organic supplements, like wood ash, a few handfuls of compost from your compost pile, or some composted manure. Then, throughout the season, just add grass clippings or heaps of weeds. They will serve as both the mulch and the source of nutrients that will slowly seep into the ground.

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You can further increase the availability of organic nutrients to your autoflower plants by inoculating the soil with beneficial microbes. There are lots of inoculants on the market today. These ones are most often used for cannabis:

  • Advanced Nutrients Voodoo Juice – 5 billion beneficial bacteria in every liter,
  • Advanced Nutrients Tarantula – 10 million viable beneficial bacteria per gram,
  • Advanced Nutrients Piranha – a special combination of ecto and endo mycorrhizae,
  • Bush Doctor Microbe Brew – concentrated fungi and bacteria + nutrients.

You Can Use Cheap Generic Nutes

Nothing is easier than going to the nearest gardening center and buying a bottle of nutrients that was designed for other crops, but can as well serve an autoflower grower.

As always, make sure that for the vegetative growth you use a fertilizer that contains more N (nitrogen) than P (phosphorus) and K (potassium). And when your cannabis starts to flower, switch to a fertilizer that shows more P and K in its N-P-K numbers. Read the instructions on the label carefully and try not to give your autoflowers more than ¼ to ½ of what’s recommended. Hungry weed is always healthier than overfed weed.

If there’s a choice between organic and synthetic nutrients, we suggest that you choose organic ones. This way it’s easier to avoid overfeeding and nutrient burn, and the smoke will be cleaner, healthier, and more flavorful.

Autoflower Outdoor Nutrients Specifically Designed for Cannabis

Today, there is a big, thriving, and rapidly growing industry that caters to weed growers. So there are many exciting and even miraculous products on the market. Let’s look at some of them.

Fox Farm Nutrients

FoxFarm produces a wide range of products for different crops. Some of them are quite effective as autoflower outdoor nutrients. It’s arguably more convenient to choose some of their dry fertilizers for an outdoor grow, including slow-release formulas. Another good option would be soluble products because they are cheaper than liquid ones.

Here are three examples:

  • Marine Cuisine (NPK – 10-7-7) is a slow-release organic nutrient; it’s a mix of sea plants that you’ll only have to apply once at the beginning of the season.
  • Open Sesame (NPK – 5-45-19) is a high-phosphorus fertilizer that will stimulate the formation of flowers at the start of the budding stage.
  • Beastie Bloomz (NPK – 0-50-30) contains high amounts of phosphorus and potassium which will boost the swelling of your buds.

Buy Gelato Auto (FastBuds)

Fox Farm’s Open Sesame & Beastie Bloomz: Both worked well. I misjudged how long my plant was gonna flower for so I didnt get to use these at the exact moments I had wanted to but everything turned out beautiful.

Earth Juice’s Bloom Original Formula & Catalyst: I added this at the end in hopes to increase potency or resin production but once again I misjudged my plants bloom cycle so it wasn’t as effective as it could have been


Green Buzz Liquids

Green Buzz Liquids offer 100% organic fertilizers which are fine tuned to the needs of cannabis plants at the different stages of their development. You can purchase not only well-balanced formulas of macronutrients (NPK), but also a lot of amendments, boosters, and enhancers.

  • Organic Grow & Bloom (NPK – 4-2-6 and 2-3-4), for veg and flower phases, respectively,
  • Organic More PK (NPK – 4-6-10), to really boost the budding,
  • More Roots, to increase the root mass,
  • Humic Acid Plus, to stimulate nutrient uptake,
  • Fast Buds, for faster transition to flowering,
  • Big Fruits, for up to 25% bigger buds,
  • Living Organics, another great inoculant to make plant food more available and protect cannabis from environmental stress.

organic nutrients for royal bluematic rqs

Green Buzz Liquids: they went along nice with this grow,mutated my buds into hard rock solid ones,as to expect from good nutes


CANNA Nutrients

CANNA make their products specifically for marijuana growers, that’s why any of them can be used as autoflower outdoor nutrients. Even those that are meant for a totally different medium and setup, like an indoor grow on coco coir.

CANNA is what the grower quoted below used (along with many Advanced Nutrients supplements). The fertilizer formula that he chose is CANNA Coco A+B. It consists of two bottles. You add both one after another and together they have the NPK of 5-4-3. Besides, they contain all necessary micronutrients.

glue auto fastbuds with CANNA nutrients

Canna: Easy to use, does what it says on the bottle.

Advanced Nutrients: I have been impressed by the results I have seen with this brand. I may change my base nutrition to the connoisseur range on my next grows.


BioBizz Nutrients

This company is very popular with cannabis growers and for a reason. BioBizz products are reliable and easy to use. The staple of their line are Bio-Grow (nutrients for veg), Bio-Bloom (nutrients for flower), and Top-Max (blooming stimulator). However, for their Outdoor Try-Pack BioBizz have chosen a different set:

  • Bio-Bloom, the perfect ratio of NPK + enzymes & amino acids,
  • Fish-Mix, fish emulsion + Dutch sugar beet extract to feed beneficial bacteria in the root zone,
  • Top-Max, a mix of of humic and fulvic acids.

In the grow cited below, the gardener used another two supplements:

  • Alg-A-Mic, seaweed extracts to prevent or overcome stress,
  • Acti-Vera, an aloe vera extract to make plants stronger and healthier.

BioBizz: Excellent product worth the extra money compared to Flora Series
autoflower outdoor nutrients biobizz


Advanced Nutrients

When looking for autoflower outdoor nutrients, never ever forget about Advanced Nutrients. We have already mentioned their two inoculants—Tarantula and Piranha. But this company offers a very long list of exciting nutrients and supplements. Below are just a few of them:

  • Big Bud, a careful blend of P, K, and amino acids,
  • Bud Factor X, boosts the production of resin and terpenes like no other,
  • Bud Ignitor, for faster onset of flowering and more numerous bud sites,
  • Bud Candy, sugars, aminos, and vitamins for huge and sweet-tasting buds,
  • B-52, a source of vitamin B for stress & heat resistance and better nutrient uptake,
  • Flawless Finish, to flush your buds for cleaner and tastier smoke.

girl scout cookies grown with advanced nutrients

Advanced Nutrients: Maybe I used too much nutrients, next time I will try and find a balance… | Bud Ignitor: Incredible boosting Flawless Finish: From now on i will always use this Advanced Nutrients product. I’m in real love with this one

B.A.C.: I have nothing bad or good to say, just a good nutrient brand.

Atami: It’s a 10. Essential #1, this product has been, is and will be the best.


Autoflower Outdoor Nutrients for Every Budget

An outdoor cannabis grow shouldn’t be complicated or expensive. Odds are that any weedy patch will turn into a great garden and bring you enough bud to live through the winter. But if you decide to spend some money on nutrients, the result can be even better. And we have got you acquainted with a few reputable producers whose products won’t let you down.

And maybe you already have some outdoor growing experience—good or bad—with a specific line of nutrients. Please feel free to share it with your fellow-gardeners in the comments section.


XXL Autoflower Strains 2022: 10 Highest-Yielding Autoflowers

We have our own share of personal experience with XXL autoflower strains, but, for this post, we have combed through Growdiaries for some champion autoflower grows. Let’s start the countdown!

XXL Autoflower Strains Ranked by Real-Life Yield

#10 Green Poison XL Auto (Sweet Seeds)

This is a balanced indica-sativa hybrid with 15 to 20 percent THC, a pleasant sweet and fruity smoke, and a mellow easy-going high. The breeder has selectively bred this strain for several generations making sure that all plants have about 25% longer stems than their predecessors. As a result, Green Poison XL Auto has more bud sites and heavier yields.

Green Poison XL Auto one of true autoflower XXL strains

Grow another round of these stanky ass weeds,
Sweet Seeds comin with that fire on these!
not another xl out there stackin such cheese, show it to your growmies gonna take em to their knees
Jigga please, these seeds grow trees
Tallest in the garden, other autos like “jeez”
“She a beast, blocking all my breeze she is. Look at all her shiny crystals, cola in my shiz it is”


#9 Royal Gorilla Automatic (Royal Queen Seeds)

A taller, wider, and more productive strain when grown outdoors, Royal Gorilla Auto is leaning to the indica side. Its highly resinous buds have a bold taste of Diesel and Kush and smell of pine and citrus fruit. Thanks to 20% THC, this hybrid is amazingly potent. Its alround euphoric high makes you both glued to the couch and very stimulated mentally.

Make sure to check out other XXL autoflower strains in the large and glorious Gorilla family.

Royal Gorilla Automatic Royal Queen Seeds xxl yield outdoors

The Royal Gorilla Auto is quick, she finished on time and came in at 682 grams wet weight which is good for an autoflower in a pot that size running soil.


#8 Northern Light Automatic (Royal Queen Seeds)

Northern Light Auto is an old-school indica lineage that is available practically in any seed bank’s collection. This xxl autoflower version by RQS produces compact plants with a huge central cola and much smaller side branches. Perfect for SOG. You’ll get tons of buds that have a pleasant sweet smell and relax you without making your body immobile, nor killing your motivation to do your chores. A nice physically calming and mentally envigorating stuff to smoke from late afternoon till it’s time for bed.

Northern Light Automatic Royal Queen Seeds

What a blast I had doing my first grow ever and getting this result!


#7 Zkittlez Auto (FastBuds)

This candy-flavored treat is celebrated for its intense sweetness. Its berry and fruity overtones become overwhelming after a proper cure. The THC level of 23% is something to awe even seasoned smokers, and newbies can give up growing for good after just one harvest. The buds are simply so potent that they may last you for years. The effect of Zkittlez Auto is a hybrid one. It starts all in the head and then settles in your body for long three hours or mellow relaxation.

Zkittlez Auto FastBuds

She came on thick and fast from germination and stayed that way through to Harvest… Had a good experience keeping her wet and pushing the her nutrient levels.


#6 Auto Blueberry Ghost OG (Original Sensible Seeds)

The Blueberry line isn’t exactly famous for its xxl yields, but this hybrid of Blueberry and Ghost OG seems to be an exception. Auto Blueberry Ghost OG produces oversized and heavy buds with a strong and clean flavor of berries and fruits. The high first overwhelms you with a surge of euphoria and then morphs into a loud body buzz—like a roaring applause for the great job on the part of the breeder.

Auto Blueberry Ghost OG Original Sensible Seeds

This is a moneymaker, 180 g in 13 weeks is a great outcome.


#5 Girl Scout Cookies (FastBuds)

Girl Scout Cookies is the flagship of the new-generation cannabis coming from the US West Coast. This autoflowering version by FastBuds gives you a chance to grow the same quality buds as the patrons of California’s dispensaries enjoy. The aroma is one-of-a-kind. It combines the smell of coookie dow with a background of Kush and earth. The high envigorates you mentally, but makes your body immobile for hours. Doesn’t matter because you don’t have to be anywhere else to feel completely happy.

Girl Scout Cookies FastBuds

This is my second time growing a Girl Scout Cookies autoflower! … She grew with vigor, and yielded a sticky bounty!


#4 Big Bang Auto (Green House Seeds)

Big Bang Auto was bred for commercial yields, but also to be commercially appealing. With a frosty appearence like this and large solid flower clusters it can’t be anything but. The smoke is also very pleasant: mellow, soothing, and very effective medicinally. You can use this weed for pain and lack of appetite.

autoflower xxl strains - Big Bang Auto Green House Seeds

… never grew anything in my life before and i gotta say im happy with my results… they were easy, took my countless mistakes of overwatering like a champ, and responded really well to LST and defoliation. ive never trained a plant before so u can imagine but she just loved all the trainings and always fully recovered only after a day later. overall, a very tolerating strain. PERFECT for newbies who are bound to make a mistake or 2. Exceptionally high yielding for an Auto…


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#3 Pineapple Express Auto (Barney’s Farm)

Pineapple Express Auto is an undying classic. This particular version by Barney’s Farm has so much more than the champion yield to recommend it. You’ll fall in love with the mouth-watering juicy flavor of this marijuana, as well as its high that melts away any stress and drowns you in perfect happiness.

Pineapple Express Auto Barney's Farm

Very easy and strong one, would recommend for beginers and for experienced growers if they look for a plant you can’t kill, I’ve tried 😉 … Not always good conditions but good light, fertilizers and a lot of air for the roots did their jobs good, still I am very amazed by capabilities of this strain


#2 Pineapple Express (FastBuds)

There are newer and trendier xxl autoflower strains in FastBuds collection, but people still go bonkers when they see Pineapple Express Auto. These plants are so frosty, you’ll end up smoking stem and branches, too. Or at least rub them till all the resin that covers them sticks to your fingers. Been there, done that. With so much THC, the effect is strong and long lasting, intensely relaxing and free of paranoia. The flavor is a rich tropical mix.

Pineapple Express FastBuds autoflower xxl yield 326g

She was a “slow and steady wins the race” phenotype! 6 weeks veg + 8 week flower…. This lady holds my personal record, for my largest yield from an indoor plant!!!


#1 Among XXL Autoflower Strains — Purple Lemonade (FastBuds)

This plant embodies everything you look for in a modern xxl autoflower. It’s gigantic, insanely productive, and tolerant of any abuse that a newbie grower can throw at it. The finished product is picture perfect, has a bittersweet zesty taste, and creates a unique high. Despite its indica dominance and 22% THC, Purple Lemonade does not create a stony, groggy, drowsy feeling. If anything, it rather boosts your energy, leaving you motivated and creative.

Purple Lemonade FastBuds autoflower XXL wonder in DWC

Make sure u have room for this variety! Absolutely monstrous! The more u train the bigger and more fruitful she gets… so get that finger work going! Every cola was a donkey dick glorious!



Autoflower XXL Yield Champions
XXL Autoflower Strains BRD Medium Yield Per Plant
Green Poison XL Auto SS Soil 123g
Royal Gorilla Automatic RQS Soil 125g
Northern Light Automatic RQS Soil 139g
Zkittlez Auto FB Soil 145g
Auto Blueberry Ghost OG OSS Soil 180g
Girl Scout Cookies FB Soil 182g
Big Bang Auto GHS Soil 200g
Pineapple Express Auto BF DWC 290g
Pineapple Express FB Soil 326g
Purple Lemonade FB DWC 537g


The one below didn’t quite make the cut yield-wise, but we simply couldn’t pass on such a beauty!

Original Auto Northern Lights (FastBuds): An XXL Autoflower Strain All the Way

Actually, 330g (11.64oz) from two plants is a great result, especially in a 24”x24” (0.5m2) tent.

The huge colas of Original Auto Northern Lights are completely frosted by THC crystals and taste like rich soil with hints of spices and fruit. Smoke them after a long day, and your body will get filled with heavy-handed drowsy euphoria. This is the perfect remedy for nighttime relaxation.

Original Auto Northern Lights Fastbuds


More XXL Autoflower Strains

The 11 strains we described above have demonstrated their ability to bring insane amounts of bud. Choose any of them, and you’re on your way to outsized harvests.

And if you want something else (different names, flavors, genetics, etc.), check out this list of high yielders. We have pre-filtered them for autoflower xxl yield, but you can filter them further until you hit on something that perfectly suits your needs.